*{
    margin:0;
    padding:0;
    list-style: none;
    text-decoration: none;
}
#main{
    width:1200px;
    height:100%;
    margin: 0 auto;

}
#title{
    width:1200px;
    height:30px;
    margin: 0 auto;
    background-color:red;
}
#title .T_left{
    width:200px;
    height: 30px;
    float: left;
}
#title .T_right{
    width:1000px;
    height:30px;
    float: right;
}
#choose{
    width: 1200px;
    height: 100px;
    margin: 0 auto;
    background-color: aquamarine;
}
#choose .link{
    width: 100px;
    height: 100px;
    margin:0 150px;
    float: left;
    background-color: cornflowerblue;
}
#users{
    width: 1200px;
    height: 500px;
    margin: 0 auto;

}
#users #users_left{
    width:200px;
    height:500px;
    float: left;

}
#users #users_left .current{
    width:200px;
    height:50px;
    background-color:  greenyellow;
}
#users #users_left .online_users{
    width:200px;
    height:450px;
    background-color:blueviolet;
}
#users #users_right{
    width:1000px;
    height:500px;
    float: left;
    background-color: mediumpurple;
}
#users #users_right .content{
    width:1000px;
    height:400px;
    background-color: lightgreen;
}
#users #users_right .go{
    width:1000px;
    height:100px;
    background-color: pink;
}